CVE-2026-43898 SandboxJS: Sandbox escape via Function.caller leakage of internal call op

SandboxJS is a JavaScript sandboxing library. Prior to 0.9.6, sandbox-defined functions expose Function.caller, allowing sandboxed code to recover the internal LispType.Call runtime callback. That callback can then be invoked with attacker-controlled fake context and obj values to extract blocked...

GHSA-G8F2-4F4F-5JQW SandboxJS has a sandbox escape via Function.caller leakage of internal call op

Summary Sandbox-defined functions expose Function.caller, allowing sandboxed code to recover the internal LispType.Call runtime callback. That callback can then be invoked with attacker-controlled fake context and obj values to extract blocked host statics, recover the real host Function...

PT-2026-39892

Name of the Vulnerable Software and Affected Versions SandboxJS versions prior to 0.9.6 Description Sandbox-defined functions expose the Function.caller property, which allows sandboxed code to recover the internal LispType.Call runtime callback. An attacker can invoke this callback using forged...